Health officials are issuing a public health alert after an international traveler with a confirmed case of measles visited Newark Liberty International Airport Monday.

The individual, a young child from Brussels, was infectious that day, according to the New Jersey Department of Health. The child departed for Memphis from Terminal C and may have visited other parts of the airport.

Anyone at the airport between 12:45 p.m. and 9:00 p.m, may have been exposed, and symptoms could develop as late as April 2.